Add 8/21 and 40/80
8/21 + 40/80 is 37/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
8/21 = 8 × 80/21 × 80 = 640/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
40/80 = 40 × 21/80 × 21 = 840/1680 - Add the two like fractions:
640/1680 + 840/1680 = 640 + 840/1680 = 1480/1680 - 1480/1680 simplified gives 37/42
- So, 8/21 + 40/80 = 37/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/21+40/80 8/42+40/80 24/21+40/80 8/63+40/80 40/21+40/80 56/21+40/80